New model to tune the dielectric properties of dense and half-dense sintered polycrystalline cu-doped Ni–Zn ferrite
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Títol
New model to tune the dielectric properties of dense and half-dense sintered polycrystalline cu-doped Ni–Zn ferriteAutoria
Data de publicació
2021-11-30Editor
Elsevier; European Ceramic SocietyISSN
0955-2219Cita bibliogràfica
VICENTE, Nuria, et al. New model to tune the dielectric properties of dense and half-dense sintered polycrystalline cu-doped Ni–Zn ferrite. Journal of the European Ceramic Society, 2022, vol. 42, no 3, p. 965-972.Tipus de document
info:eu-repo/semantics/articleVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Sintered polycrystalline Cu-doped Ni–Zn ferrite specimens have been successfully prepared by a conventional ceramic method using different pressure-temperature-time cycles. The studied samples, with an average grain ... [+]
Sintered polycrystalline Cu-doped Ni–Zn ferrite specimens have been successfully prepared by a conventional ceramic method using different pressure-temperature-time cycles. The studied samples, with an average grain size of 5–25 μm and a porosity less than 0.20, exhibited a high effective complex permittivity-real part () and a minimum dielectric loss above 1 GHz.
was successfully calculated using the Bruggeman-Landauer equation for the lowest angular frequencies and the Jayasundere-Smith equation for the highest one. To accurately predict the values of , both equations must be improved considering the Zheng approach. The need to change the model highlights the change in the polarization mechanism that occurs at high angular frequencies.
The two proposed modified equations allow predicting the for a dense and half-dense ferrite from its microstructure (porosity) and its constituent permittivities (grain and air). [-]
Publicat a
Journal of the European Ceramic Society, 42 (2022) 965–972Dades relacionades
https://ars.els-cdn.com/content/image/1-s2.0-S0955221921008347-mmc1.docxEntitat finançadora
Ministerio de Economía y Competitividad (Spain) | Universitat Jaume I
Codi del projecte o subvenció
MAT2016–76320-R | UJIB2017-48 | UJIB2020-13 | POSDOC/2020/04
Drets d'accés
0955-2219/© 2021 The Authors.
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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